gynodynamics

plural noun (treated as sing.)
the study of properties of the human vagina, and esp. of the interaction between the vagina and solid bodies moving through it.
-the properties of a solid object regarding the manner in which the vagina accommodates it.
-(treated as pl.) these properties insofar as they result in maximum efficiency of motion.

DERIVATIVES
gynodynamicist --noun

Berkeley gynodynamics experts concern themselves with optimizing glide and minimizing discomfort.